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Ampeg's Portaflex PF-500 bass head delivers a staggering 500W of power in an ultra-compact design providing pure Ampeg tone in an extremely portable package. Precise tone controls and gig-friendly input/output options provide ultimate flexibility. Pair it with Ampeg's PF Series flip-top cabinets for the vintage styling and portability of the iconic Portaflex originals.

The tone stack on the PF-500 provides an extensive array of tone controls for shaping your sound. Bass, mid, and treble controls come standard with a 5-position mid switch for finding the perfect midrange level for your sound. Ultra Hi/Lo boosts add even more on-the-fly options, and an onboard compressor keeps your levels in check and your tone punchy and tight.


  • 500W RMS output @ 4 ohms.
  • MOSFET preamp.
  • Class D power amp.
  • XLR balanced line out.
  • Ultra Hi/Lo boosts.
  • Onboard compressor.
  • Balanced direct out with pre/post-EQ option, -40dB pad, and ground lift.
  • FX loop with dedicated mix control (foot switchable with optional AFP2 switch).
  • Power amp in/ preamp out.
  • 1/8" headphone out/line in.
  • 15dB input pad.
  • Power supply: switching.